Infiniti G37 Coupe. Manual - part 685

EXL-160

< ECU DIAGNOSIS >

[XENON TYPE]

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

Fail Safe

INFOID:0000000001837036

CAN COMMUNICATION CONTROL

When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN
communication recovers normally, it also returns to normal control.

If No CAN Communication Is Available With ECM

JCMWA0849GB

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

EXL-161

< ECU DIAGNOSIS >

[XENON TYPE]

C

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EXL

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P

If No CAN Communication Is Available With BCM

IGNITION RELAY MALFUNCTION DETECTION FUNCTION

• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it. 
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation

coil circuit.

• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to

alert the user to the ignition relay malfunction when the ignition switch is turned OFF.

NOTE:

The tail lamp turns OFF when the ignition switch is turned ON.

FRONT WIPER CONTROL

IPDM E/R detects front wiper stop position by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 seconds activation and 20 seconds stop five times.

NOTE:

Control part

Fail-safe operation

Cooling fan

• Outputs the pulse duty signal (PWM signal) 100% when the ignition switch is turned 

ON

• Outputs the pulse duty signal (PWM signal) 0% when the ignition switch is turned OFF

A/C compressor

A/C relay OFF

Alternator

Outputs the power generation command signal (PWM signal) 0%

Control part

Fail-safe operation

Headlamp

• Turns ON the headlamp low relay when the ignition switch is turned ON
• Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp high relay OFF

• Parking  lamps
• License plate lamps
• Side maker lamps
• Illuminations
• Tail lamps

• Turns ON the tail lamp relay when the ignition switch is turned ON
• Turns OFF the tail lamp relay when the ignition switch is turned OFF

Front wiper

• The status just before activation of fail-safe control is maintained until the ignition 

switch is turned OFF while the front wiper is operating at LO or HI speed.

• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-

safe control is activated while the front wiper is set in the INT mode and the front wiper 
motor is operating.

Front fog lamps

Front fog lamp relay OFF

Horn

Horn OFF

Ignition relay

The status just before activation of fail-safe is maintained.

Starter motor

Starter control relay OFF

Steering lock unit

Steering lock relay OFF

DTC

Ignition switch

Ignition relay

Tail lamp relay

—

ON

ON

—

—

OFF

OFF

—

B2098: IGN RELAY ON

OFF

ON

ON (10 minutes)

B2099: IGN RELAY OFF

ON

OFF

—

Ignition switch

Front wiper switch

Front wiper auto stop signal

ON

OFF

The front wiper auto stop signal (stop posi-
tion) cannot be input for 10 seconds.

ON

The front wiper auto stop signal does not 
change for 10 seconds.

EXL-162

< ECU DIAGNOSIS >

[XENON TYPE]

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

This operation status can be confirmed on the IPDM E/R “Data Monitor” that displays “BLOCK” for the item
“WIP PROT” while the wiper is stopped.

STARTER MOTOR PROTECTION FUNCTION

IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.

DTC Index

INFOID:0000000001837037

NOTE:
• The details of time display are as follows.
- CRNT: A malfunction is detected now
- PAST: A malfunction was detected in the past.
• IGN counter is displayed on FFD (Freeze Frame data).
- The number is 0 when is detected now
- The number increases like 1 

→

 2 ··· 38 

→

 39 after returning to the normal condition whenever IGN OFF 

→

ON.

- The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.

×

: Applicable

CONSULT display

Fail-safe

Refer to

No DTC is detected.
further testing
may be required.

—

—

U1000: CAN COMM CIRCUIT

×

PCS-16

B2098: IGN RELAY ON

×

PCS-17

B2099: IGN RELAY OFF

—

PCS-18

B2108: STRG LCK RELAY ON

—

SEC-101

B2109: STRG LCK RELAY OFF

—

SEC-102

B210A: STRG LCK STATE SW

—

SEC-103

B210B: START CONT RLY ON

—

SEC-107

B210C: START CONT RLY OFF

—

SEC-108

B210D: STARTER RELAY ON

—

SEC-109

B210E: STARTER RELAY OFF

—

SEC-110

B210F: INTRLCK/PNP SW ON

—

SEC-112

B2110: INTRLCK/PNP SW OFF

—

SEC-116

AFS CONTROL UNIT

EXL-163

< ECU DIAGNOSIS >

[XENON TYPE]

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EXL

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AFS CONTROL UNIT

Reference Value

INFOID:0000000001604700

VALUES ON THE DIAGNOSIS TOOL

CONSULT-III MONITOR ITEM

TERMINAL LAYOUT

PHYSICAL VALUES

Monitor Item

Condition

Value/Status

STR ANGLE SIG

Steering

Straight-forward

Approx. 0

°

Steering

Approx. -900

°

 - +900

°

VHCL SPD

Driving at 40 km/h

40 km/h

SLCT LVR POSI

Selector lever operation

P - 1

HEAD LAMP

Light switch

2ND

On

Other than 2ND

Off

AFS switch

AFS switch

ON

On

OFF

Off

HI SEN OTP RR

Vehicle rear height

Unloaded vehicle condition

Approx. 2.5 V

Low (Leveling operation 
downward edge) 

Standard suspension models:

Approx. 1.7 V

Sport suspension models:

Approx. 1.9 V

LEV ACTR VLTG

Headlamp leveling

Unloaded vehicle condition

Approx. 70.0%

Low (Leveling operation 
downward edge) 

Standard suspension models:

Approx. 46.6%

Sport suspension models:

Approx. 51.69%

SWVL SEN RH

Right headlamp swivel activation

Standard position

Approx. 0

°

Activation

Positive degree (+

°

)

SWVL SEN LH

Left headlamp swivel activation

Standard position

Approx. 0

°

Activation

Positive degree (+

°

)

SWVL ANGLE RH

Right headlamp swivel activation

Standard position

Approx. 0

°

Activation

Positive degree (+

°

)

SWVL ANGLE LH

Left headlamp swivel activation

Standard position

Approx. 0

°

Activation

Positive degree (+

°

)

JPLIA0176ZZ